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Inorganic and organic arsenic speciation in seawaters in IEC-HG-AAS

, : Inorganic and organic arsenic speciation in seawaters in IEC-HG-AAS. Analytical Letters 29(15): 2701-2712

Arsenic (RI), arsenic (V), monomethylarsonic acid (MMA), and dimethylarsinic acid (DMA) were separated by ion-exchange chromatography. The elution sequence was as follows: 1.5 M ammonia followed by 0.12 M hydrochloric acid yielding As(III); 1 M hydrochloric acid followed by water yielding first As(V) and then MMA. Detection was by hydride generation-atomic absorption spectrometry. No interference was noted from 13 metallic ions. The method provides a good linearity, precision, accuracy, and sensitivity. It has been applied to the speciation of arsenic in seawaters from the North West coast of Spain (1200 Km).


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Wong, G.; Li, M.W.Y.; Howard, K.; Hua, D.K.; Chapman, J.R.; Bourke, M.; Turner, R.; Tong, A.; Craig, J.C., 2013: Health benefits and costs of screening for colorectal cancer in people on dialysis or who have received a kidney transplant. Despite the higher risk of colorectal cancer (CRC) in people with chronic kidney disease, it remains uncertain whether early detection through screening is cost-effective in this setting. We aimed to determine the costs and health benefits of CRC...

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Kheirolomoom, A.; Dayton, P.A.; Lum, A.F.H.; Little, E.; Paoli, E.E.; Zheng, H.; Ferrara, K.W., 2007: Acoustically-active microbubbles conjugated to liposomes: characterization of a proposed drug delivery vehicle. A new acoustically-active delivery vehicle was developed by conjugating liposomes and microbubbles, using the high affinity interaction between avidin and biotin. Binding between microbubbles and liposomes, each containing 5% DSPE-PEG2kBiotin, wa...

Wahid, R.; Ward, A.James.; Møller, H.Bjarne.; Søegaard, K.; Eriksen, Jørgen., 2015: Biogas potential from forbs and grass-clover mixture with the application of near infrared spectroscopy. This study investigated the potentials of forbs; caraway, chicory, red clover and ribwort plantain as substrates for biogas production. One-, two- and four-cut systems were implemented and the influence on dry matter yields, chemical compositions...